December 2021
Beginner to intermediate
240 pages
6h 6m
English
Content preview from Mastering Apache Pulsar
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 10. Pulsar SQL
At this point, we know we can interact with Pulsar in the following ways:
-
Pulsar CLI
-
Pulsar Admin API
-
Pulsar clients
-
Pulsar Functions
-
Pulsar IO
Another way we can interact with Pulsar topics is through Structured Query Language (SQL). With Pulsar SQL, we can treat topics as tables and query them with SQL. However, before diving into how querying topics with SQL is possible, we should ask why do this at all? After all, using another tool or another language has some disadvantages that we should consider as well. Among these disadvantages are:
-
Increased complexity from managing more semantics
-
Cost considerations
-
Cognitive overhead from managing new tools
We know Apache Pulsar is a storage system for event streams. With that lens, we can see the necessity and utility of alternative data interaction mechanisms. For example, with Pulsar Functions, we get a simple API that allows us to manipulate messages one at a time. With Pulsar IO, we get a repeatable mechanism for moving data to and from Pulsar topics. What advantage does querying a topic with SQL bring to the table?
SQL is the most ubiquitous programming language. Analytics engineers, designers, programmers, data scientists, and executives can all utilize it. In addition, popular databases like PostgreSQL, MySQL, Oracle, and Redshift all use a dialect of SQL to query data. Pulsar topics contain event data and are often the ingress point for an application. Enabling more people to access ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.